<template>
  <ul>
    <li :style="{opacity}">欢迎学习VUe</li>
    <li>news001 <input type="text"></li>
    <li>news002 <input type="text"></li>
    <li>news003 <input type="text"></li>
  </ul>
</template>

<script>
export default {
  name: "News",
  data(){
    return {
      opacity:1
    }
  },
  beforeDestroy() {
    console.log('news即将被销毁')
    // clearInterval(this.timer)
  },
  mounted() {
    // this.timer = setInterval(()=>{
    //   console.log('@')
    //   this.opacity -=0.01
    //   if(this.opacity <=0) this.opacity = 1
    // },16)
  },
  activated() {
    console.log("News组件被激活了")
    this.timer = setInterval(()=>{
      console.log('@')
      this.opacity -=0.01
      if(this.opacity <=0) this.opacity = 1
    },16)
  },
  deactivated() {
    console.log("News失活了")
    clearInterval(this.timer)
  }
}
</script>

<style scoped>

</style>
